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=== WebSession === | |||
With [5.0.0+] sdk-nso added <code>nn::web::Session::</code>. WebApplet (Web shim title) doesn't seem to implement this, unknown if other titles do. | |||
This is for sending/receiving [[#SessionMessage]]s via applet Interactive storage. | |||
During state init, max_messages is set to 0xA and max_size is set to 0x5000, with message_count=0 and cur_size=0. | |||
When sending messages, there has to be an available message slot available (<code>max_messages!=message_count</code>), and there has to be enough space avilable (<code>msghdr_contentsize+0x10 + cur_size <= max_size</code>). After pushing the storage, message_count is incremented and cur_size is increased by <code>msghdr_contentsize+0x10</code>. | |||
When receiving messages, it will repeatedly pop Interactive output storage until no more are available. If the ID is not 0x1000/0x0, the message is ignored. Otherwise: | |||
* Ack: Verifies that message_count is not already 0, then decrements it. Then cur_size is decreased by the u32 loaded from msgcontent+0. | |||
* 0x0: Does some validation. Copies the first 8-bytes from the header to the user [[#SessionMessage]]. Reads the message content into the user [[#SessionMessage]], when contentsize is non-zero. Then sends an Ack with the storage size. | |||
==== SessionMessage ==== | |||
{| class="wikitable" border="1" | |||
|- | |||
! Offset | |||
! Size | |||
! Description | |||
|- | |||
| 0x0 | |||
| 0x10 | |||
| [[#SessionMessageHeader]] | |||
|- | |||
| 0x10 | |||
| Size from header | |||
| Message content | |||
|} | |||
==== SessionMessageHeader ==== | |||
{| class="wikitable" border="1" | |||
|- | |||
! Offset | |||
! Size | |||
! Description | |||
|- | |||
| 0x0 | |||
| 0x4 | |||
| Message ID | |||
|- | |||
| 0x4 | |||
| 0x4 | |||
| Content size following the header. | |||
|- | |||
| 0x8 | |||
| 0x8 | |||
| Unused | |||
|} | |||
==== IDs ==== | |||
{| class="wikitable" border="1" | |||
|- | |||
! ID | |||
! Content size | |||
! Description | |||
|- | |||
| 0x0 | |||
| Arbitrary | |||
| Arbitrary content. | |||
|- | |||
| 0x1000 | |||
| 0x8 | |||
| Ack. Content: first u32 is the entire storage size of the message being acked, while the second u32 is 0. | |||
|} | |} | ||